Headlight



. Jan.

w. P. CARSTARPHEN HEADLIGHT File July 1925 g ntol a headlight casing.

Patented Jan. 18, 1927.

UNITED STATES PATENT OFFICE.

WILLIAM P. CARSTARPHEN, OF DENVER, COLORADO.

HEADLIGHT.

Application filed July 9, 1925. Serial No. 42,524.

. provide a construction that can be readily secured in place and which can be applied to headlights of various diameters. As there are a large number of differentmakes of automobiles and as each make has a special type of headlight it is evident that an enormous stock of reflectors would have to be carried by a dealer if he were to be in position to fit all sizes and makes of lamps. It would also be necessary for the manufacturer to have a large number of dies. In order to obviate these difliculties, I have produced an improved reflector that is so constructed that it can be secured to the ordinary reflector with which the headlight is equipped and which will fit a large number of different sizes of lamps.

My improved reflector consists. of a concave reflecting surface formed in the manner described in the above identified patent. The reflector has a flat circular flangeat its outer end and a tubular portion extending axially from the rear thereof. The circular flange is adapted to fit within the old reflector and to contact with the inner surface near the front edge thereof. The tubular member is intended to project through an opening in the rear of the old reflector and to be secured to the latter by means of a nut or other clamping means.

In order to describe my invention with greater clearness and more particularity I shall have reference to the accompanying drawing in which the invention has been illustrated and in which:

Fig. 1 is a section taken on line 11, Fig. 2;

Fig. 2 is a section taken on line 2-2 Fig. 1 and V Fig. 3 is a section taken on line 33 Numeral 1 represents any ordinary lamp housing; 2 the ring by means of which the lens 3 is held in place and 4 the ordinary reflector which is usually of parabolic form. The reflector 4, ring and housing 1 are merely representative of corresponding members foundin all headlights now in the market. The housing 1 has an inwardly extending tubular projection 5 in which the lamp socket 6 is slidably secured by means of the screw 7 and spring 8. It is well known that the dispersion of light from a parabolic reflector is objectionable for the reason that if the light source is not exactly at the focus they blind the drivers of approaching machines and if the light is exactly at the focus, then they project a cylindrical beam of light of the same diameter as the reflector, which is useless for illuminating the road. In the patent above identified I have described a reflector that gives a good light on the road and does not produce a blinding glare and in this drawing I have indicated this reflector by the numeral 9. It is my intention to secure this reflector in place within the reflector 4 and I accomplish this in the following manner: Reflector 9 has a circular flange 10 extending outwardly from its front end. The diameter of this flange is somewhat less than the maximum internal diameter of the reflector 4 so that when the reflector 9 is inserted within the reflector 4, the flange 10 will engage the inner surface of the latter near the front edge thereof. Reflector 9 is provided at its rear with an axially extending tubular member 11 that is of sufficient length to project through the axial opening 12 of the reflector 4. The tubular member 11 is threaded and after it has been inserted through the opening 12, a nut 13 is applied to it in the manner shown in Figs. 2 and 3. It is obvious that by tightening the nut 13, the reflector 9 can be secured in place within the reflector 4, as it will produce a force that will pull the flange 10 against the surface of the reflector 4. As the inner surface of a parabolic reflector makes quite an angle with the axis of the reflector, it is evident that by properly it selecting the diameter of the flange 10 of the reflector 9, the latter can be used with a large number of different sizes of parabolic reflectors so that by keeping in stock reflectors having flanges of, say, three different diameters, it is possible to fit almost any of the ordinary sized headlights. The flange 10 is provided with a mark let that coincides with the major axis of the reflector and by means of which the reflector is adjusted about its axis. It is evident that with a reflector constructed in the manner described, any desired rotary adjustment can be made, whereas, if the reflector were provided with bayonet connection for securing it in place, rotary adjustment could not be made.

Although I have shown a reflecting surface of a peculiar construction, it is evident that my fastening means may be employed inconnection with any kind of a reflecting surface and can be employed with advantage wherever a different kind of a reflect inn surface is to be applied to a headlight.

The opening 12 is usually reamed out and as all ordinary reflectors are provided with an axial opening it is only necessary to enlarge this to the proper size to receive the tubular member 11.

7 Having now described my invention, what I claim as new is: I

'A headlight comprisin in combination, an outer housing, a concave reflector located within said housing, a second concave reflector of smaller size than the first and adapted to be secured in place within the first reflector, said second reflector having a circular flange extending outwardly at its open end, the diameter of said circular flange being less than themaximum inside diameter of the first mentioned reflector whereby it will contact with the inner surface of they first mentioned reflector at some point within the same and means comprising a threaded tubular member for securing. said reflectors together,

In testimony whereof I aflix my signature. i 1

WILLIAM P. CARSTARPHEN. 

